<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cart in cartList" :key="cart.id">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :checked='cart.isChecked' @change="changeSkuChecked($event,cart)" :key="Date.now()">
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl">
            <div class="item-msg">
              {{ cart.skuName }}
            </div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice?.toFixed(2) }}</span>
          </li>
          <li class="cart-list-con5">
            <a href="javascript:void(0)" class="mins" @click="changeSkuNum(cart,-1)">-</a>
            <input autocomplete="off" type="text" minnum="1" class="itxt" :value='cart.skuNum' @change="changeSkuNumHandler(cart,$event.target.value)">
            <a href="javascript:void(0)" class="plus" @click="changeSkuNum(cart,1)">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ (cart.skuNum * cart.skuPrice)?.toFixed(2) }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click.prevent='deleteHandler(cart)'>删除</a>
            <br>
            <a href="#none">移到收藏</a>
          </li>
        </ul>

      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" :checked="isSelAll" @change="changeCheckAll">
        <span>全选</span>
      </div>
      <div class="option">
        <a href="javascript:;" @click="deleteCartSel">删除选中的商品</a>
        <a href="javascript:;">移到我的关注</a>
        <a href="javascript:;">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择 <span>{{ selCount }}</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ totalAmount }}</i>
        </div>
        <div class="sumbtn">
          <router-link to="/trade" class="sum-btn" >结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { mapActions,mapState } from 'vuex'
  export default {
    name: 'ShopCart',
    computed: {
      ...mapState('cart',['cartList']),
      //全选
      isSelAll() {
        return this.cartList.every(cart => cart.isChecked) && this.cartList.length
      },
      //选中个数
      selCount() {
        return this.cartList.reduce((prev,cart) => {
          return prev + cart.skuNum * cart.isChecked
        },0)
      },
      //总价
      totalAmount() {
        return this.cartList.reduce((prev,cart) => {
          return prev + cart.skuNum * cart.skuPrice * cart.isChecked
        },0)
      }
    },
    mounted() {
      this.getCartList()
    },
    methods: {
      ...mapActions('cart',['getCartList','checkCart','deleteCart','addCart','batchCheckedAll','batchDeleteSel']),
      //删除选中
      async deleteCartSel() {
        let skuIdList = this.cartList.filter(cart => cart.isChecked).map(cart => cart.skuId)
        
        try {
          await this.batchDeleteSel(skuIdList)
          alert('批量删除成功')

          this.getCartList()
        } catch (error) {
          console.error(error);
          alert('批量删除失败')
        } 
      },
      //全部选中
      async changeCheckAll(e) {
        console.log(e.target.checked)
        let skuIdList = this.cartList.map(cart => cart.skuId);
        console.log(skuIdList);

        try {
          await this.batchCheckedAll({
            isChecked: +e.target.checked,
            skuIdList
          })
          alert('修改全部商品选中状态成功')
          this.getCartList()
        } catch (error) {
          console.error(error);
          alert('修改全部商品选中状态失败')
        }
      },
      //input框输入修改
      async changeSkuNumHandler(cart,num) {
        let reg = /^[1-9]\d*$/
        if (!reg.test(num)) {
          this.$forceUpdate()
          alert('输入的商品数量不符合要求,请重新输入')
          return
        }
        this.changeSkuNum(cart, num - cart.skuNum)
      },
      //加减按钮修改商品数量
      async changeSkuNum(cart,num){
        if (cart.skuNum + num < 1) {
          alert('商品数量不能小于1')
          return
        }

        try {
          await this.addCart({
            skuId: cart.skuId,
            skuNum: num
          })
          alert('修改数量成功')
          this.getCartList()
        } catch (error) {
          console.error(error)
          alert('修改数量失败')
        }
      },
      //删除商品
      async deleteHandler(cart) {
        try {
          await this.deleteCart(cart.skuId)
          //重新获取数据，渲染页面
          this.getCartList()
        } catch (error) {
          console.error(error);
          alert('删除失败')
        }
      },
      //商品选中状态
      async changeSkuChecked(e,cartInfo) {
        try {
          await this.checkCart({
            skuId: cartInfo.skuId,
            isChecked: +e.target.checked
          })
          this.getCartList()
        } catch (error) {
          alert('选中失败,请重试')
          this.$forceUpdate()
        }
      }
    }
  }

</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;
  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }
  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;
      & > div {
        float: left;
      }
      .cart-th1 {
        width: 25%;
        input {
          vertical-align: middle;
        }
        span {
          vertical-align: middle;
        }
      }
      .cart-th2 {
        width: 25%;
      }
      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }
    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;
      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;
        & > li {
          float: left;
        }
        .cart-list-con1 {
          width: 15%;
        }
        .cart-list-con2 {
          width: 35%;
          img {
            width: 82px;
            height: 82px;
            float: left;
          }
          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }
        .cart-list-con4 {
          width: 10%;
        }
        .cart-list-con5 {
          width: 17%;
          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 33px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }
  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }
			

      .sumbtn {
        float: right;

        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
        }
      }
    }
  }
}
</style>